PCT1789W DATA SHEET
PRELIMINARY
PCT303DW CONTROL REGISTERS
!!
International Control 2
(Register 17, R/W)
Reserved
BTE
ROV
BTD
7
6
5
4
3
2
1
0
Reset settings: 00h
Bit Definitions:
Bits
Name
Description
7:3
2
Reserved
BTE
Reserved. Read returns zero.
Billing tone detector enable.
When set, the PCT303DW can detect a billing tone signal on the line and maintain
off-hook through the billing tone. If a billing tone is detected, bit 0 (BTD) is set to indi-
cate the event.
1
0
ROV
BTD
Receive overload. Read-only.
This bit is set when the receive input detects an excessive input level. This bit is
cleared by writing a zero to this location.
Billing tone detected. Read-only.
This bit is set if bit 2 (BTE) is enabled and a billing tone is detected. This bit is cleared
by writing a zero to this location.
International Control 3
(Register 18, R/W)
Reserved
RFWE
SQLCH
7
6
5
4
3
2
1
0
Reset settings: 00h
Bit Definitions:
Bits
Name
Description
Reserved. Read returns zero.
Ring detector full-wave rectifier enable. Read-only.
7:2
1
Reserved
RFWE
When set, the ring-detection circuitry provides full-wave rectification. This effects the
data stream presented on SDO during ring detection.
0
SQLCH
Ring detect network squelch.
This bit must be set, then cleared, following a polarity reversal detection.
PRELIMINARY
PC-TEL, Inc.
49
1789W0DOCDAT06A-0299
ETC [ ETC ]
